Ubuntu Mobile Internet Device Edition was an Ubuntu distribution planned to run on the Intel Mobile Internet Device platform, x86 mobile computers based on the Intel Atom processor. It was planned to use the GNOME framework Hildon as the basis for its GUI.
According to Canonical, it would provide an uncompromised Web 2.0 experience: Web browsing, email, media, camera, VoIP, instant messaging, GPS, blogging, digital TV, games, contacts, dates/calendar, simple software updates will be available periodically. Ubuntu Mobile Edition will only need a touchscreen device and a finger for navigation.
In June 2008 Ubuntu MID Edition 8.04 was released
Ubuntu MID Edition ended active development after 9.10 Alpha 6.
The development of MID has stopped but Ubuntu continues to work on mobile distributions such as Kubuntu Mobile
source : wikipedia.org